摘要
为了解决聚磷酸铵(Ammonium polyphosphate, APP)水溶度高以及与聚合物基体相容度差的问题,在APP表面原位合成超细氢氧化铝(Aluminium hydroxide, ATH)粒子,探讨反应时间、反应温度和无水氯化铝用量对反应结果的影响,并通过与水性环氧树脂(Waterborne epoxy, WEP)的结合验证改性方案的有效性。结果表明:当温度为60℃、无水氯化铝用量为2 g和反应时间为2 h时,APP的水溶度从0.95 g/(100 mL)降低到0.22 g/(100 mL),比表面积从1.24 m^(2)/g增大到15.36 m^(2)/g;SEM图显示APP表面由光滑变得粗糙,TEM图表明ATH粒子分布在APP的表面;通过FTIR、XRD测试证明包覆在APP表面的为ATH粒子,TGA测试表明ATH@APP的残炭量显著升高;将改性后的APP与WEP结合后发现,表面粗糙度的提高有效提高了APP在聚合物基体中的相容度,燃烧测试也表明改性APP/WEP样条可以产生更厚更稳定的炭化层,以抑制进一步的燃烧,证实了沉淀法改性的APP可以有效提高WEP阻燃性能。
In order to improve the high water solubility of ammonium polyphosphate(APP) and poor compatibility between ammonium polyphosphate(APP) and polymer matrix, ultrafine aluminum hydroxide(ATH) particles were in situ synthesed on the surface of APP to explore the effects of reaction time, reaction temperature and the dose of anhydrous aluminum chloride on the reaction results. The effectiveness of this scheme was verified by the combination with waterborne epoxy resin(WEP). The experimental results showed that when the reaction temperature was 60 ℃, the dose of anhydrous aluminum chloride was 2 g, and the reaction time was 2 h, the water solubility of APP decreased from 0.95 g/(100 mL) to 0.22 g/100 mL, and the specific surface area increased from 1.24 m^(2)/g to 15.36 m^(2)/g. The SEM image showed that the APP surface became rough. The TEM image showed that ATH particles were evenly distributed on the APP surface. The FTIR and XRD tests verified that ATH particles were coated on the APP surface. TGA test showed a significant increase in the carbon residue of ATH@APP. After combining the modified APP with WEP, it was found that the improvement of the surface roughness effectively improved the compatibility of APP in the polymer matrix. The combustion test also showed that the modified APP/WEP spline could be used to roduce a thicker and more stable carbonization layer to inhibit further combustion, indicating that the APP modified by precipitation method could effectively improve the flame retardant performance of WEP.
作者
蔡菲
杲爽
孙锦涛
孙同同
司银松
傅雅琴
CAI Fei;GAO Shuang;SUN Jintao;SUN Tongtong;SI Yinsong;FU Yaqin(School of Materials Science&Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China;Xi'an Carbon Materials Co.,Ltd.,Xi'an 710089,China)
出处
《浙江理工大学学报（自然科学版）》
2022年第1期1-8,共8页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
基金
国家自然科学基金项目(52003243)。
关键词
聚磷酸铵
氢氧化铝
沉淀法改性
阻燃水性环氧树脂
ammonium polyphosphate
aluminium hydroxide
precipitation modification
flame retardant waterborne epoxy resin
